/**Layer 111: Advanced Topics*/

/* UI for Tags */
#article-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.topic-tag {
    background: #f1f5f9;
    color: #475569;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid #e2e8f0;
}

.topic-tag:hover {
    background: #e2e8f0;
    color: #1e293b;
}

/* Depth Coloring */
.topic-tag.depth-0 {
    border-color: #cbd5e1;
}

/* Top Level */
.topic-tag.depth-1 {
    border-color: #93c5fd;
    background: #eff6ff;
    color: #1d4ed8;
}

/* Category */
.topic-tag.depth-2 {
    border-color: #fcd34d;
    background: #fffbeb;
    color: #b45309;
}

/* Specific Context */


/* Taxonomy Tree Browser */
.taxonomy-browser {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.taxonomy-browser h3 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    color: #334155;
}

.topic-tree,
.topic-tree ul {
    list-style: none;
    padding-left: 1.2rem;
    margin: 0;
    border-left: 1px solid #e2e8f0;
}

.topic-tree li {
    margin: 0.5rem 0;
    position: relative;
}

.topic-tree li::before {
    content: '';
    position: absolute;
    left: -1.2rem;
    top: 0.7em;
    width: 1rem;
    height: 1px;
    background: #e2e8f0;
}

.topic-node {
    font-size: 0.9rem;
    color: #64748b;
    padding: 2px 6px;
    border-radius: 4px;
}

.topic-node:hover {
    background: #f1f5f9;
    color: #0f172a;
}